{
  "manageEntity": {
    "action": "Save",
    "entityId": "1738829562",
    "entityType": "Track",
    "nonce": "0xb6a15a2f301012ecfa9b1d14e555fdced2c4f3e91c9409b1ed6665ffc078e8eb",
    "signature": "0xd0d1130a8ed1b0328ec08df246b7aaa091ba4bd7d790359998f6acad5410ed4625bfc9ca9443eba6de91dbfb55fa30f523c13c3104878ee6fedcf2ac359188f31b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}