{
  "manageEntity": {
    "action": "Save",
    "entityId": "832485",
    "entityType": "Track",
    "nonce": "0x38a381f0b2cdff717a680d2a3f4fe4f1af4bb98ae5e8063e4d735e2cdacb006a",
    "signature": "0xf8667e07baec9c574de4f90e7d79126d00cc277a25066e693e7da575e306f277159d3d4ba6569f4afaff2bfd3f610ec4cf65124c1a653f9605f1f24a238ccfa71b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}