{
  "manageEntity": {
    "action": "Save",
    "entityId": "757431174",
    "entityType": "Track",
    "nonce": "0x220cc6462b947cf471ff71393101e7fbd16feb82727389ed8abfd3c702e13b00",
    "signature": "0xe1f8eef4dd3f775ed2a53e5e348e0eaf2e4677aa6e65519c79f3fd5ddc8f828f02a258c97078cdfe14f149dd954695b817d556a15b405e3c93fac5800638c0811b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}