{
  "manageEntity": {
    "action": "Save",
    "entityId": "2007219985",
    "entityType": "Track",
    "nonce": "0xc4ef20ee7c9aad8562683b0082fd23e95063cd92d1bebf4266135ac0ee010c9b",
    "signature": "0x9bb812d65b998264bee23de1b006f7b98c6bbdc99387193cd49ee5effb6d1d207cfe419a18eee33b83688d72f33e05c95157e15877092aaf20e2c57c26f29ac71c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}