{
  "manageEntity": {
    "action": "Save",
    "entityId": "1515873555",
    "entityType": "Track",
    "nonce": "0xf923d8db11e0bcb4ba500a6a5a62e907630b83bd088d3669a6ff83206747a51e",
    "signature": "0xd33daed6a4645400ad9a51ef9431f976d5bf66f9d05713c7005d86e742b9ea0305a2858631a084b28b0c8573f1ca95d2106abb0572ce89fac4be17884e646ea01c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}