{
  "manageEntity": {
    "action": "Save",
    "entityId": "970269299",
    "entityType": "Track",
    "nonce": "0x4f2a0247405ebf1ad744127f457b015ba4b175334e4fe569720cb836296fad60",
    "signature": "0xef34924f293dd95c65950570d868eca6e2b396feba395d8ca6646703cce7034e6a4d40914a7af406b169e05a71c681fe6995ac948146ad03843056cfad3a51c21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}