{
  "manageEntity": {
    "action": "Save",
    "entityId": "294018",
    "entityType": "Track",
    "nonce": "0xc0eae52f572c2820cc9bc348e9ad126c1e2f7fe10b966525c55b175ac6b4cc83",
    "signature": "0x71f6b6238f32f601d2d8cb1c8b54dad15cabae7f8b0b621b6ea59e2bf77f75d215310f75bca00833abb4b30f357cfcf5e697bcf45bfc9ef4fe5f9d682ee8c4f91b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}