{
  "manageEntity": {
    "action": "Save",
    "entityId": "1430883818",
    "entityType": "Track",
    "nonce": "0xe09b418de38b02812e0a625e63479d6fa382a91871c6cea346b0e2e7494af5dc",
    "signature": "0x74c98c4af07c01c5539914fd979d2795d77eb7dc7332fdbde8d3035e64b50b6144a0413bd08da5706b3d3036b43e28b148a6a4cd03073a9c33476917c40a06151b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}