{
  "manageEntity": {
    "action": "Save",
    "entityId": "812449407",
    "entityType": "Track",
    "nonce": "0xaf8be7c4caf0fa371708852966052fa952a65c7bfef9164381e07d12e604671f",
    "signature": "0xc803393a3d3ea1fa24f9adcadc824548d62d9615d00baba53b31ce39db93051d5f4d9d4ae1f1616d60aaa84a3c97fd46947278f7c0bcba703358b836bd0940351c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}