{
  "manageEntity": {
    "action": "Save",
    "entityId": "295118651",
    "entityType": "Track",
    "nonce": "1786454160315006639",
    "signature": "0x61c3d2786a72c279a3418c3e7f008db18c2f13c75488c2c3f01f2c49473cf3f818414b2b9ddb5d29d4a2f3de576be1e4b67b6abf08d9e8c514377ade59d526941c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}