{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854303547",
    "entityType": "Track",
    "nonce": "0xd41bfebd33bd834306b2f5a3561e76a3f34b80808371e76bcd7752eaad317b46",
    "signature": "0xae32867a39ba4cb4450147b8884ccff4b0689edb579b851e710da77e24a4567d4b1856a2f8ecdd899bf02314b77526cd28f18bd32d76325b100cdfcc1f7ab95d1c",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}