{
  "manageEntity": {
    "action": "Save",
    "entityId": "1417390847",
    "entityType": "Track",
    "nonce": "1786738891031697605",
    "signature": "0x31069b8b333646912a2a094696625af182943ce60d8d39467d62dfe0efb96c4457bc4b8b90d07a9f51d048bc8ec99225673b5e03c30db298ad6e6c43d01fcbfc1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}