{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199643279",
    "entityType": "Track",
    "nonce": "0xe43df3d7ed30e6a3a712b86e283e19690371acd45ba15695d98d12861bca270d",
    "signature": "0x5213ac402236f05fb137a4efbfe31a320be7f1815bddc662b268cbd96213b2fb0c6080256e9e3724bf6ee881f593c275eac1ba544002febf5ebc3b323fab99f11b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}