{
  "manageEntity": {
    "action": "Save",
    "entityId": "75783327",
    "entityType": "Track",
    "nonce": "0xd5ea73a88aa83208cd4cba39373fcf4b9101e8e64a4543de2027dd48d2636dee",
    "signature": "0xa9622bc9bb9a16e9a2419c8aa565295d1a5fcf3186aa610613159e3de56de7ee74d44a5f8cccd7232b0cdaa1d117d4e08258391187d3cd10cea349d9256875bd1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}