{
  "manageEntity": {
    "action": "Save",
    "entityId": "468207072",
    "entityType": "Track",
    "nonce": "0xbd9d4ec63eeda800b285baa29c2b4d6ed73a8327149adbe9747305ed63a8f286",
    "signature": "0xb6c26f53da8f0018e6d33565b3507ce8a5636833199c07ee0a10691d4f31c6e001ea583739b63912d13bd2126fb2f0489bc77e33c1dd2c9a23759cf7ce381d3e1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}