{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834789333",
    "entityType": "Track",
    "nonce": "0x2276f51e812697792e12c2aa5a185eb8b66c12342b599af516a77c18291ba171",
    "signature": "0x1b9adce01978fca3086deda33fe23b705e221ac23cb514d93abd149728e6d76e5cd96a94fd1dd1e298a7b00975e698592e38f841dfa6db48af6a48d34523e07f1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}