{
  "manageEntity": {
    "action": "Save",
    "entityId": "836476252",
    "entityType": "Track",
    "nonce": "0x7561688d6383ab235449ee7226adce73c558418cb082d42769509601e3951866",
    "signature": "0xa7ba75df249d0a038205bcd0cb1aaeb0ef985804eaa4fd5a8ed3b942c59bb5f545ae2f1443d9ea0dfac31ad55cf34b1ca9b2293df89ecef4a8698fcc12f906101b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}