{
  "manageEntity": {
    "action": "Save",
    "entityId": "1277059450",
    "entityType": "Track",
    "nonce": "0x1b6ce3e7ae6d63a96805511801beef320eb8308267d54ff865988bc9d4e5e342",
    "signature": "0x5c1e39acad2183abd77b9a5b3bee9d0ddd60a8bc8b6a0495cb89cafbdf8b2a711d2128e16508c0674f7c5f0a3ed5d5b6e888c4f13700831c31b9e384b69337901b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}