{
  "manageEntity": {
    "action": "Save",
    "entityId": "938454287",
    "entityType": "Track",
    "nonce": "0xdaac1736fd237abbd055c243978b42f732cf6578707c4ab3a2f538425d7558aa",
    "signature": "0x22a79019e684befef40b09a0e6ac117654c630004cbad636cd16e101ee3f51562f8c1fea921133d701b850e0b00e1eacdfb81f0759a6b9449aae226c8c82ef5e1c",
    "signer": "0xB8f8B5d3F3Eb7280BbD8BF51709df5Cd46820Fe5",
    "userId": "234784224"
  }
}