{
  "manageEntity": {
    "action": "Save",
    "entityId": "326018416",
    "entityType": "Track",
    "nonce": "0x1ad7fc5db2488922440685f6def1023ba2cd9b5f6e0b588ccef396d912c7f415",
    "signature": "0x4c0c60757c55a40451d2475606d6cbdb84983d2eecedce08b970d240c11c68d65281af08917772765459d571e7567f8364fc2a30c59fe89135823ec6fe8714691b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}