{
  "manageEntity": {
    "action": "Save",
    "entityId": "946282075",
    "entityType": "Track",
    "nonce": "0x19a130e4191abccda33b242c959b3091a034604bfdcd055360bbe0435eee81bf",
    "signature": "0x41b3c51804611484b71954d06c7274852c022a9c82b7f37c798922e09e581eb913f5c93f94956cfe4db255801d99f42cf0fc6da2bfbf11a1180ff2c2c8f3f45b1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}