{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100385096",
    "entityType": "Track",
    "nonce": "0xeff11e03c1401c74487c4e5717db5eb2546efbf63b62d2356498d3e28aeed4e2",
    "signature": "0xa4add9148b2d8793307702598da80ff7bb89515280f76efb6b47c0f89286f9b433cdbf80d4bb79b9a0c9bb585aa0771835be4525f7e8ba87ea72cf3306cba19a1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}