{
  "manageEntity": {
    "action": "Save",
    "entityId": "1444006210",
    "entityType": "Track",
    "nonce": "0x4a2c56bd2904bcebd0be8b22b8f8e95b0ba4a3c7f4d837df375d7da6bd1c89a5",
    "signature": "0xa7d519b65992082fb041be7fcf53a856f621921573f86fab21259de585b79bd67331ae32243a92157726adf4fb141ddaa558174b44f731cb3069fa00cd3f26611b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}