{
  "manageEntity": {
    "action": "Save",
    "entityId": "306956988",
    "entityType": "Track",
    "nonce": "0x3970eea420fd09c6a91f01f500593d1a83a79811e9a0314594a7ecedc738d954",
    "signature": "0x45348a4ef8ad800c102657eeb296c0c9d51cd495cf83d91d2062b48704f88a8c218f6a7cad3b87d7e00166ee5e1bcd534ff0d2efb9cbf3caaf83809853935dc51c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}