{
  "manageEntity": {
    "action": "Save",
    "entityId": "1591743766",
    "entityType": "Track",
    "nonce": "0x5a1f832439a70739cbe3e50f9873ce2bbba2e020ea31be3b8f183993ec3e39e3",
    "signature": "0x9294bcefa6260d1c0942b6c5966935c4370545042f3350eeb562e40739eeb80d6716b1a0a95157f4b2e773a232c00edd9c2a2cdb1cb7a862cf1b0d8413dce6eb1c",
    "signer": "0x22AC4e184Dc6B3f1F286b53b22E2D65931EcfEa8",
    "userId": "851552461"
  }
}