{
  "manageEntity": {
    "action": "Save",
    "entityId": "583881287",
    "entityType": "Track",
    "nonce": "0x8dc65af6b5514a6dd8f69a49fe2a4aed659d830fd58e2ad84823b9bf9be34a46",
    "signature": "0x70ef0cec9d62829236c22002c23efecf5752a25b75fc3dec83f73137d7d888d622ba8bbd1c8cbf74c3b4d36e264067879c5ca65ed49bdcc16f2ed6d05882366b1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}