{
  "manageEntity": {
    "action": "Save",
    "entityId": "1974716057",
    "entityType": "Track",
    "nonce": "0x32b9a70a1cd928fe238986030f86b3482c375fe31a962329b370038af2671d85",
    "signature": "0x6d04c294543f2c4d1912cf08dc0c77a2f95cc88c7c39012f531608c7e546257829328e3e0809ceb6fd46cd079cb1531925bc2811894bdb4b8b669837fb4c2bd91c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}