{
  "manageEntity": {
    "action": "Save",
    "entityId": "1194686093",
    "entityType": "Track",
    "nonce": "0x3b137553911d99f91032e50dd30aebd1bcf4d2bad863865347652aafe0399c5e",
    "signature": "0xa3425cb3de7de6ab5f788177bc924e3fb448571b4173fbc02d6845151c49cd4a34c6cb26cd05fb6159202054150e4137e6a68699e6da5db3e749142ba1ada5de1c",
    "signer": "0xC52D6c1E255E7617F07475f531fCF4c870e7E31E",
    "userId": "587506327"
  }
}