{
  "manageEntity": {
    "action": "Save",
    "entityId": "1312806760",
    "entityType": "Track",
    "nonce": "0xb55032be7889ec49d4c951b22c2a536048aa401d9645deec26aa936cffad3aab",
    "signature": "0x55b48cee224246bd028ccfb57c11608111a05fe88c200a2f54acd35ea82ba76b4ec45f8df479778682c815a3cf515677240c0df399cc8d239a872a17e2b793221b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}