{
  "manageEntity": {
    "action": "Save",
    "entityId": "336436",
    "entityType": "Track",
    "nonce": "0xcfae49766972184398a8bf66ff494b4c834cea00e5246d0648d05fda9ee3b195",
    "signature": "0x675b1cd928c5c5e7d6b76962fc9fcc86547e9a58739ef05b0db4c71107aa8eb8703a0e475baca221baf81320078dc8f9e90726be4b86673974514b200cafbde51c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}