{
  "manageEntity": {
    "action": "Save",
    "entityId": "1902594133",
    "entityType": "Track",
    "nonce": "0xc13e5f968d7709d2fcf58365b3841b13fd9f0050f7e2ad5adf937a92cb62b357",
    "signature": "0xffacc2d5f00285950d98895ba11d685e1359d2e866fb9680cc17e54d78135e67034535579e8324b8640b92df1aca22e7d933aa9bb61c1e594a88b6312adea33f1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}