{
  "manageEntity": {
    "action": "Save",
    "entityId": "811870953",
    "entityType": "Track",
    "nonce": "0xa6f2853a8d30472f5d215f435d29f4c66bd47cf19f8399510bd786bde73e68d8",
    "signature": "0x6302c60b8543e7ec39e04ecff9e24618803d961601e29d284084c071ec5b902272f756d8f5605dbdc1f6b67106545e58aaaaae37fbc749df4ec0b08f790df85e1c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}