{
  "manageEntity": {
    "action": "Save",
    "entityId": "1115416445",
    "entityType": "Track",
    "nonce": "0x9296b1ac43f117ae8dc6d0c79422a0233441a1cde38a4ed98ab052ada3527cf4",
    "signature": "0x0a933c1146a82708b00aa3cd8731ff9c8823a01751d363b2b22897fa1f0aa21b0d5366e42be6309b8b11457b74c85f279c001ac7b31f9a7601cb86c5f5cfa11a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}