{
  "manageEntity": {
    "action": "Save",
    "entityId": "934620219",
    "entityType": "Track",
    "nonce": "1787409326639049069",
    "signature": "0x5be52efe6c0881e5b96f1fff1d2263f035a1622fa0e644c87ea4d1e049cd44a909cc94a77f2438541b8698fbc58a2d6e7d1bb3bf6dfa112c2b80e842ffadbc0b1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}