{
  "manageEntity": {
    "action": "Save",
    "entityId": "1622938932",
    "entityType": "Track",
    "nonce": "0x49e2fa5343eebf852eecb8086c1e9be3faa03cdb8b8b990a72efaa1f4ff42704",
    "signature": "0x3d4c01201ea985e794b4b72934058651a87c638bf9b0138d94f095bf2b619713154a775bbb36d07762de5a71cca01c2363774825c1e2731ac4f6bcb068e469cf1b",
    "signer": "0xC7B16Eee24C03712c67aa884907593f4df23db87",
    "userId": "56534466"
  }
}