{
  "manageEntity": {
    "action": "Save",
    "entityId": "91061399",
    "entityType": "Track",
    "nonce": "0xa8ff9c608d69347ec8880840628045b08707b6c3f3561773d7039a3dff8a73ad",
    "signature": "0xa07077cda245c1c27d74fddf5f83f03f15c741e4645fd8e58e91ddecf30ef69049008d8df401a75221a87d0b93aa5642375e203a30e95598f8fff3df8c0b91a21c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}