{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150806931",
    "entityType": "Track",
    "nonce": "0x53c7b841f0538c50e114999c4b0d073283681772e69a9cea22a88808b1b8e655",
    "signature": "0xcbe714aa093ed357fc5b24111934f241ed380db8919f206aec49ce7e938816a54167c22c950d5e083acfa0bad2f637ee994eb6cb55310ecfa19e54996ef598c81b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}