{
  "manageEntity": {
    "action": "Save",
    "entityId": "1928935665",
    "entityType": "Track",
    "nonce": "0x93dc29b442590bc1cedbeb6dc2f87a33aa52e70ae475f73ef65ad58edcd1a041",
    "signature": "0x7f12ed6000ca511ad319eceaadfecdef05c53245657143141602761e729c4354201444275a89892c17b47e4179e78f3383bbe84b24228503712fb415eb582ecb1c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}