{
  "manageEntity": {
    "action": "Save",
    "entityId": "804078527",
    "entityType": "Track",
    "nonce": "0x7a1500149eaab8c678847d327aa41fc58de8743f7c6a0ac02dfb89e1121879f6",
    "signature": "0xdeb065fc808407545e7b7b93cdfe983220cfb13a9e0287343a196fbff3b2d3e3047d6d5eec6ebda68c3b924601c971e73b05096e86a6551b4e36216e0fb66f481c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}