{
  "manageEntity": {
    "action": "Save",
    "entityId": "325405",
    "entityType": "Track",
    "nonce": "0x4525b699876b824d5aad4f9ab4bfac2661a613f71e388382e076e31d5b8b89c7",
    "signature": "0xdeb363f1faf00e89f75c0e754245b33a8f030a1aafff96dfdb6309abe64246851e92da91d528f9e935ddfce283f0e2fef74629c80ac04e0a34de49d93171abfd1c",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}