{
  "manageEntity": {
    "action": "Save",
    "entityId": "324934944",
    "entityType": "Track",
    "nonce": "0xdcb48caa8c7bfbcf06bc99f15d3abe7f3448fba909347b044f53c3c3f0d31203",
    "signature": "0x184d8a6e5486ea14da60c689bd9ab9d491ce87be22200abb73625eae4219d91658b502c52b338e360658cc08b4995e66f994101f3a0ff2cbc26be79a3196a7831c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}