{
  "manageEntity": {
    "action": "Save",
    "entityId": "1390290205",
    "entityType": "Track",
    "nonce": "0xca6d052b66283a212b87133fbf86aea77bd0ddc30708751289df9007019e6b8a",
    "signature": "0x9ed501addc422a711053384fe7cd103025001d4606e87fa9ce59b145051cf76e0d5d1587306705fe46c5d5d86356a882f9a9b679f26323488cc9f7fb57b567501b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}