{
  "manageEntity": {
    "action": "Save",
    "entityId": "2056469690",
    "entityType": "Track",
    "nonce": "0x385316b2780ae828a267d1b4e6e94ef95ffe6c5eb3cd0428f2140ce328ad1554",
    "signature": "0x38097cadf633e3a5c99cf72a441b0c2aa1ad2530ee504a780e2bfeffd4e68a1a350ec0e00ee1040f4540c001fa7fcb7b319a16c2c4c8d9c11b0b67d14f2cdd481c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}