{
  "manageEntity": {
    "action": "Save",
    "entityId": "1671987418",
    "entityType": "Track",
    "nonce": "0x53efffdf61d7001c6fdee4a6b80c1b9f94d8207b813ffc4f1ffa944ee68f2a99",
    "signature": "0x71acd7f462d63be5b52b812753d8e04befa8b2e50f2c6887c0023de4f3741eff3d1921724bc9f46f58b29ea6342a3849fe1fac38b28fe5f6a9878827241ac6851c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}