{
  "manageEntity": {
    "action": "Save",
    "entityId": "954471",
    "entityType": "Track",
    "nonce": "0xd12e44e9bfff3b0653799b2c2bd453cce138d1f473a60b9279628de438b65f5d",
    "signature": "0x04bb28b5f76db0e6a88c5da2250740f8ca991d0abdfaddbf6b09e7a38a40381153e5b5d2eb56d8f86df8094cd4053f3b91b895379c80cb0d199dc7ee2d31acc11c",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}