{
  "manageEntity": {
    "action": "Save",
    "entityId": "820296001",
    "entityType": "Track",
    "nonce": "0xaa7c59c487acea03ece5675e405c79c02eef3082d3615b8bae0b8199abc67992",
    "signature": "0x5cb40ba65afacdf51dcea7c654055b27c8915cdd3761fdd4677a1d3d18a8a3da3fb9f91b146576563668c6467959c449fd41af2387b836f314236db4eb0e172b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}