{
  "manageEntity": {
    "action": "Save",
    "entityId": "566317622",
    "entityType": "Track",
    "nonce": "0x0d5356605227710ed411301b2335e63305054a2ef9dfdb39a49bc3451fa9c8fc",
    "signature": "0x671c178692470d014bab881f60fdc20a8ffb682167f57300ab3b634facc36a0b2e010f879d714597479c1d351be3128109bd8f98c81d7311768feed8ca063b321c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}