{
  "manageEntity": {
    "action": "Save",
    "entityId": "1389316927",
    "entityType": "Track",
    "nonce": "0x78c9193a35eb445ac3d8c1d5a2a414ba906eef396077c9bec29a02a190f7a6fe",
    "signature": "0x16b24b34c06f3e4913746e4b36b7a2e04baa445818f2f5f295c568abce6ddb8a32d60a34e87bdcff90a69c402f28830dd2feb52641b2fd80eef23b6e3c54f52c1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}