{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250644811",
    "entityType": "Track",
    "nonce": "0x1f407e80714f4767b3964e79effd0a5677fa430cd45ce5faca598ad5355da056",
    "signature": "0xf161e5b4873ebce519ab2b0fbc32e880d1f3dd2fffc7e5eb7c3ec4fa4262990923fad9780eac46ee08cca86b5ad84c7f7e52d9d70c1fa2f829803bb81b87526e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}