{
  "manageEntity": {
    "action": "Save",
    "entityId": "535681598",
    "entityType": "Track",
    "nonce": "0x2889fcf6c3fdc18926d9f95a1f8e1d9a6ccaf4579db5a3ce9195d2b19f1c2016",
    "signature": "0x8697bc151831984feaf77b09ff5d76f8ee1293ef6e56dc0c85f0726e50f222da4da13985a903e1badb61e5c187b4242c9812962e9fd5f28415664092af2f98c11c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}