{
"manageEntity": {
"action": "Save",
"entityId": "1423019632",
"entityType": "Track",
"nonce": "0x63210fab26ae321c3cafff726edfb582659197688df137168090817af1edb477",
"signature": "0x7bcd9fec6aee5965b71c08a8872d6874318ec60c9ef5096737cab36bb09a20fe0fc04f7227cdd3f39c025a5a034382b5d4160f2105c4b4d5e6406b1a1f805ded1b",
"signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
"userId": "728570067"
}
}