{
  "manageEntity": {
    "action": "Save",
    "entityId": "128351069",
    "entityType": "Track",
    "nonce": "0xe9017b3e01a372f30a953ef9495697c6d9f45979fd1d1ce75fdc1dc1065511fb",
    "signature": "0x18dee140a7d1e02e49b875509535925fbd9a702f80b845bbd4f083dd53056e6d7d55e6bfa031abc943e251722f478ca6a94e339cc7345cd0365bbe2d1372a61c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}