{
  "manageEntity": {
    "action": "Save",
    "entityId": "148690",
    "entityType": "Track",
    "nonce": "0xbf4b2e73e1dc9cc76408a5e0b0bd8219986d34f2d186ea613a108b36c39798ac",
    "signature": "0x6685d83590bb8715ae41b86f63047c4231b7a01876a67a5e2a412802c13e425e7a9e05ad12eadd59712e36634a434b88e3590bff74205187bf916fdd016357dd1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}