{
  "manageEntity": {
    "action": "Save",
    "entityId": "195121150",
    "entityType": "Track",
    "nonce": "0xb7b43023e5b15196c6ebcc45b49da5d0d6497ecceb27410320611a010dc2475b",
    "signature": "0xe8d03ee5488753b54eed211365dd011bd1c0d2176da15ee8fa5ef7cd3d9737d66b2142ba4efe9b7b487bfb5c8f3ffcdbcf8e9905e9552977dfdd5540ee3bd9391b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}