{
  "manageEntity": {
    "action": "Save",
    "entityId": "569611",
    "entityType": "Track",
    "nonce": "0xfd238e54243937bcf93afbb909549106370259b195b68c0e05e793d1969018ad",
    "signature": "0x4e38ecdf0f8f6585c2e1d2819ac8f5e90bf9fb1aa1f950df5b72eab3f1c708492f8f1c712923729f9cb5c015469293b4c07c59b1abef699044152970a02fa6ea1c",
    "signer": "0x6ecE2D82C15fa37cd66A99B21fffD5ad71a32457",
    "userId": "71132378"
  }
}