{
  "manageEntity": {
    "action": "Save",
    "entityId": "364870538",
    "entityType": "Track",
    "nonce": "0x23f7e0d3c14a13d9f96a9e214440ffd7f85f50c6146b752212f0ebdd965456cd",
    "signature": "0x650b082decb41bea5f511991c01ff5300ee4fe932336f512a6ecc2743bef019149d20a45a92d9454cc68856e8f26fe5de82161961588ab20c2495701a523ede01b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}