{
  "manageEntity": {
    "action": "Save",
    "entityId": "2031487929",
    "entityType": "Track",
    "nonce": "0x87c788f930e3e4305fdef3f617f905a3da4064328eec6ced3730ff3541e28dfa",
    "signature": "0x9ea1db6fbfd5ed3b1dc490bf79b502fa884e5df53bda4512b042d765f149ecaf38a4cd67b6d2dfce0fdde56d0cf10df6310ec4ca383c09020c6fade5c18590b01c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}