{
  "manageEntity": {
    "action": "Save",
    "entityId": "544518",
    "entityType": "Track",
    "nonce": "0x0ef29bc84915f2199f90f334d89f3b265431e6d67c8937b4c62202d99b654c55",
    "signature": "0x747e43d0a9c1ff71aa873ed4e5f52ddacdb816eafefb864b14b38ce2d81826390d8b34ef89a643f3542722cb3071b885921d07a1f82fbf542254bde03b8b2d671b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}