{
  "manageEntity": {
    "action": "Save",
    "entityId": "1476765260",
    "entityType": "Track",
    "nonce": "0xd37091e049f9a10c51c11beb308e9b9fe28629ecae8e494a583ae1aea7ab81ba",
    "signature": "0x61bec3f2a83adc9b1ce9b3a5267e2ec01bf2ae42112de289bdb4d772da997c3a2182196dc3216a7b46fafc045f3439610cfe394a7694daa97c0ad9db8ceff06d1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}