{
  "manageEntity": {
    "action": "Save",
    "entityId": "568867992",
    "entityType": "Track",
    "nonce": "0x52565a69211994db5c2a23e4a8002b44e5232f984b3577c68809abb43ed3433d",
    "signature": "0xd1efdd4410d25b3aa884413bf7631102b7bbabff63e4fc2428287ae42fb1209b52144652e5db2ae84b96ecbf3d5dd161b3ef056e0843ed446a98ccf7205edc5e1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}