{
  "manageEntity": {
    "action": "Save",
    "entityId": "166572470",
    "entityType": "Track",
    "nonce": "0x899156811b68a4d06dfaad2169aa4ac0bbb2aeb766ab773da5d7979eb0f5d386",
    "signature": "0x47c7c4c4be97599fb4539a3aea34f60f8bb298413b80ba9b9db22b5c5f7d6f504ee86fb1f57a9e2020f7a07a20d42ab1f78502370d0f9633034438ea67a6d36b1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}