{
  "manageEntity": {
    "action": "Save",
    "entityId": "781536084",
    "entityType": "Track",
    "nonce": "0xcb1aea105a71d6baa5aa1fd54e7bc443d26eb234ff7a4cb34573128dcf93116e",
    "signature": "0x9bdf9f7e7c699c9631b110cddbca76db62342763511211ecf9580c388e50e8ec516ea1b5ef6f28d7ed4fed4e7dbc2a5146f3edebf3dbee32141a870d18bd42961b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}