{
  "manageEntity": {
    "action": "Save",
    "entityId": "451173317",
    "entityType": "Track",
    "nonce": "0x341eec4c0149fc4ea515a2e1ef8d124ec2a5946c1457de041719ea09b4316c2b",
    "signature": "0xe9618ecaf4bb1faf0d96700d1f905b75530a9d57cac061bb219dbc3245cf989e77a42d7b28456f4191c59bde24b2ecd2e6f1c1678fdb147420eb81747088b7c71b",
    "signer": "0x1Ca1641Eae37c12C675214fF1d208ee962444B51",
    "userId": "884320631"
  }
}