{
  "manageEntity": {
    "action": "Save",
    "entityId": "110519871",
    "entityType": "Track",
    "nonce": "0xbc1e83f4f05e14f009d69370d15b9cefc45577bad45b6e930b205f91ec6c12b8",
    "signature": "0x2a89265ddde964d0c17424559718e850ecdad1836dfe46a98e00732ef018b01c6adba859e33b929e4c5b36a7686f03de9a0b5b8d9b74fce9e28aeb3759d66d691c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}