{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021414301",
    "entityType": "Track",
    "nonce": "0xb9829f1a3c9b5634ee7e891dd681f740091863b199ed0ba5a454cd873da12b0b",
    "signature": "0xc12e72c49425582ea0bb1b55f1c6106ace0e239976ce434a3a0a0327c5381c942e292ee8edc8ab6574f1f9c815c019e20524312557423ebc75e5d5c0f3404e301b",
    "signer": "0x9118544389fdF944C91fbf793f23D9ad02b34dC9",
    "userId": "103748"
  }
}