{
  "manageEntity": {
    "action": "Save",
    "entityId": "1536128984",
    "entityType": "Track",
    "nonce": "0xe2cb44e7cacd22a3222e862f69bfa87326eab7c6d2788ae26c21882983f4a768",
    "signature": "0xe51f849e7d0a5e9073e25687f5278abd8dba446ee1d3caa923d961fd3d2c96003772d45f199e5c554abad70320813c8e0c28ff666c75d511a07ccaf7c402e32c1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}