{
  "manageEntity": {
    "action": "Save",
    "entityId": "1353484376",
    "entityType": "Track",
    "nonce": "0x2ad6619392f280f1f5e4ffc6c9913bf5ce3ab6b498b191457161b769a9b2ab05",
    "signature": "0x3d8312bdc3e0f8f598c9b988a27b0d5c4bd58f31473cfbf044a63c0f6a450f2765c22be74a1bdc67407653450a11bb0a33add9a5b228ad39109e840c6dc6752a1c",
    "signer": "0xF11F60bFb591E532d6E71E699ddfdfC58f377CA1",
    "userId": "458027684"
  }
}