{
  "manageEntity": {
    "action": "Save",
    "entityId": "178250",
    "entityType": "Track",
    "nonce": "0x1fd0933d68e4dfd3cd6fd71ef189de712dd6979206afef309505633a91bf2e67",
    "signature": "0x0debcf103b30273ec0d7e3d943ee08bbcb024465817bacf5b174851efc6995fc2df4a4d299c7e2ff5d520808dd1c28bc06ad52d96031ef55be5aa5ada664e2251b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}