{
  "manageEntity": {
    "action": "Save",
    "entityId": "472227238",
    "entityType": "Track",
    "nonce": "0x96f48cc3687f59dac9aeac3731e00da83a285f5aaadc367a713c2e5b60f8528b",
    "signature": "0x6b33c2cc3655ceeab07fe14a90ce7518a0d31b02b669c37fb9eae90f77a1ba710d9b4ecabeeb8d0d1cb9a179ae4f5d9f7f3594d22c23e90a3ecfa087495520d41c",
    "signer": "0xCCdD3363b3A62ef4636d3a4ec208a0a9017E8Eb8",
    "userId": "640720364"
  }
}