{
  "manageEntity": {
    "action": "Save",
    "entityId": "1137667537",
    "entityType": "Track",
    "nonce": "0x8761240ae1544404875bd669c77fa67f64c851c90cbba2d3a2ddb3710eb21af1",
    "signature": "0x81d4a0d3dd4f7b9fde1deb3478f63692d268f3826a13b7f6e8a9c74033e8d9846bf4d12b796beb8ac06e9707ae1a9f19a80a9c62a67874e7efe94acb41ca333a1b",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}