{
"manageEntity": {
"action": "Save",
"entityId": "872858713",
"entityType": "Track",
"nonce": "0x215399944a4e0260abe4f4608f4078d4b01dc91d1a36667775b0a864aa0fb86e",
"signature": "0xaf34474e2b635e617b32f6e6b5bd572692f625d76e5e1010389059bbe2eb5d815d292c1e9ecdce082561e278783a03682686fb874f6055e27eb7db36268fa1471b",
"signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
"userId": "162770660"
}
}