{
  "manageEntity": {
    "action": "Save",
    "entityId": "679727217",
    "entityType": "Track",
    "nonce": "1788297004132655613",
    "signature": "0x3d538a8087a6367edb1bfcd98e00beb63814a199b1872a5f8322bba683dbe01a48d0e73523eeb6b8d4ab8884fbcb13490f56c1ac4eabd90d95d576b929bed66d1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}