{
  "manageEntity": {
    "action": "Save",
    "entityId": "803276679",
    "entityType": "Track",
    "nonce": "0xc285eebdd1924d63af6950a0d22027e665141dbbd0c457807b95e8ed31e90e0b",
    "signature": "0xfa571d746546435f856c7bdf5d6561a019c9ff95c8b1afe671074f7ca4e342b8302bd05b9910bf8bcea18584d42acccda5b0ff79f86b97ae1b900aa1450064db1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}