{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947236188",
    "entityType": "Track",
    "nonce": "0xeb554a65b1ce45040c5f844fa186f2528e53fabeb9c2e998dea691abf5a18430",
    "signature": "0x0fc86f4fb3e33587020d2df34850ec2ff2d299136097fd43bef41c05fd8a02285565b2976cc5baaf1019a3d6873b4099f1fa17e89c3ef281b4e8ca09e7dc894f1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}