{
  "manageEntity": {
    "action": "Save",
    "entityId": "929576463",
    "entityType": "Track",
    "nonce": "0x2e660720cf1c8a3c9c506a6c8be9d64bcd768f3dd8472541dd89c256417b979f",
    "signature": "0xc366f5f8aa41d5b2267d5a3d9cad884b99480a25e96109dc685f6a6a216ba051709e2092e991a6f1a5793c8d3dc007c47a88b5f500665f6df4985dbaeb7224321c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}