{
  "manageEntity": {
    "action": "Save",
    "entityId": "85755171",
    "entityType": "Track",
    "nonce": "0x969186ee0907704c37acc152bb135a3cb97c9a0296b2e50390cc3b4e25f45c86",
    "signature": "0x6cf3defa1bbae089245f89c0333008bfd99f8307f2c04e2bb780353ecd807dfd60972fe9a65bc0355ffbfc6b0dab2374d209bf3be1eb64f20fcf049c7df12fd41b",
    "signer": "0xff44DfDD3e1DCDdaDD2fC3d1E6E5321De7cbC485",
    "userId": "83483639"
  }
}