{
  "manageEntity": {
    "action": "Save",
    "entityId": "311110728",
    "entityType": "Track",
    "nonce": "0x1c905a45d94dbd17928d3aaae56c12113ef326238c97df094cba6a47e5b5dfc5",
    "signature": "0x5d121dcde6ee2c0492502703328c658f1f17116f87278bc87209b838adc61aa84835ad3a77cb1c69e3b79862e32a45c7c9f6dc6d1ba8e49216237974c6c9d0321b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}