{
  "manageEntity": {
    "action": "Save",
    "entityId": "184635254",
    "entityType": "Track",
    "nonce": "0x55b7ddca4647a5377e356c50fa053d5fd251c9a23d5eee1ac896ae5391305169",
    "signature": "0xe549b3a4f3f8756f3567ebb0e492744e27337f2ba8a000421f9eb7c25bd682d621b678fc15bf8f554946a4ad879fbb2d317b1b7a202ba090b0fe7077ec5558ea1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}