{
  "manageEntity": {
    "action": "Save",
    "entityId": "851433092",
    "entityType": "Track",
    "nonce": "0x3caf606a710770b145a6191fe4bccd4731c8686b59b58dfe9f74454dc4d2d5e3",
    "signature": "0x09f84e8fb53ace5c1e8906e8b8bf3d57c4444c824087f3f3124d1bad74910f46558e37a8cdb6793f8131877a7e37370b156a60c4ce29c7822bc8307d1763e33d1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}