{
"manageEntity": {
"action": "Save",
"entityId": "1315029219",
"entityType": "Track",
"nonce": "0xaf3d11c59daf56bb2dfb4191c0893e57048b2a065fca2eac62b4c3e6af5c1c18",
"signature": "0xc4bf28bfeca534cede0c39606cb07d210f2f1d9c03ce7f214138420b6f27839d49ec25a8bd53e8cf4e1b1a69464bcd0ddf28a9399e043c907cb3c24ee30464301c",
"signer": "0x1Ef5331d98352E3A7eb4f177ae6BbD27cA99eD1B",
"userId": "771602835"
}
}