{
  "manageEntity": {
    "action": "Save",
    "entityId": "187078266",
    "entityType": "Track",
    "nonce": "0xb47991eac5eacb3b342b70f9364feece203c12cfc5ee97aa06c478e0b06c2f05",
    "signature": "0xd9987f4f12d2116079e37c9f74f99e252cb45ef91d1a03f24f4bfd052be27f3d3078112de847182e6e9a91b4f1027e1c02ab5c7c7cbf934a717ceb975bc8c40f1b",
    "signer": "0x14d7618B82Da4e7176FDe32e4379943eCd69798D",
    "userId": "238125623"
  }
}