{
  "manageEntity": {
    "action": "Save",
    "entityId": "432526909",
    "entityType": "Track",
    "nonce": "0x0781a21ecf109f4c2c2b3c124f229b51cfb9cc1c254e881c2c43d7cc6d719dbd",
    "signature": "0x1b2a28a3dbd33914c51058ec2f82cdf91c4017a8fa2dd9cc9128c26fb35a5e7c3c2ab9f1100275cff1bb6ed80c08732c266ec6e96653018c58fbcb2ed101c4cc1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}