{
  "manageEntity": {
    "action": "Save",
    "entityId": "117815936",
    "entityType": "Track",
    "nonce": "0xa2ec714094668d453cb60780e7df64eda68b6b90272c8ffe274783e1d8ed2c0c",
    "signature": "0xba6d716fa9ddf77e71f699d6a6152b6ed66672b82420c584a77a3c311481b6be0a0893459b79ff5faa5d04ae97fb40043f486ab34418a11c64146d440c1189771b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}