{
  "manageEntity": {
    "action": "Save",
    "entityId": "981372163",
    "entityType": "Track",
    "nonce": "0x3bd69c6f15ad9dc8b0cd277bd3dacfc95ec510ca6b4e4faed3926e6819921671",
    "signature": "0xf5eb975b4fd977ef561620401bd072effc287a314e8ec37e5dc5af08d48bedb6618017d5fae450cde253889478c34e5383e2e878ee7630ca32551610854e781e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}