{
  "manageEntity": {
    "action": "Save",
    "entityId": "801591713",
    "entityType": "Track",
    "nonce": "0xcb78ea1da7d40dfe266fd1d121eefc0a12cb2cc7bcdbc0ef5d3115e6fce779a0",
    "signature": "0x9653a69c606400b8a54ed7a859e0710205c23a9ae00708480b455a3696e1cd717f00ae8da7d61361f440c261ad59968b4d41d366bf9ffcb2e21a0ea3b95dbb891c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}