{
  "manageEntity": {
    "action": "Save",
    "entityId": "1916429870",
    "entityType": "Track",
    "nonce": "0xeb3e8d2fa4d2786421941a5ed4cf6de8528a65aded30a5287d44d20c2aba4ce5",
    "signature": "0x3eb33af5743574e13cee6bcbac3a587e32576ff0249764a5e63e713413612e9c709186d9e21b4b1906f085e17570dc5160a77f6e691d49b3031c777ff40ecd5e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}