{
  "manageEntity": {
    "action": "Save",
    "entityId": "951537",
    "entityType": "Track",
    "nonce": "0x5ed0cb8017a14e5def84d503ca206f8719d0485194fd1c80fd35d01751f01e72",
    "signature": "0xcd252ed0394fbca0c714cfc073eebcca1932c4995b3ec1b89f1dc2e3c097e86a515c812b8b6d1a0a09c048df97395eeb43de5c92621481f769652558b2f15b7e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}