{
  "manageEntity": {
    "action": "Save",
    "entityId": "486982918",
    "entityType": "Track",
    "nonce": "0x11200592d22e0ee031e7512ef46f000051f44d6477a0d8fae420f75a2f3be915",
    "signature": "0x84dec6976d68dbd81f8d1bc73fe1e7eeb0ebcd9a413517180c634c3deca720181df18cca115064ce8e9c9c9359d695eb374b462f5f9633268650bedb34e3b4351c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}