{
  "manageEntity": {
    "action": "Save",
    "entityId": "631563",
    "entityType": "Track",
    "nonce": "0x7c79e921c886496a046f968c588d91fd5f89cb78ea913331dadb5f3d936cac21",
    "signature": "0x6bb49add525172a906a556862a982f05b3fb389a647fb33a373defd99eebb4d50f83aa2f0f589b8da2159252d3ddc84be36b11fd23530cea3c1eac60cf92591d1c",
    "signer": "0x13f8ca0832087662A9bA298e1F708853B8615826",
    "userId": "990836999"
  }
}