{
  "manageEntity": {
    "action": "Save",
    "entityId": "1717723714",
    "entityType": "Track",
    "nonce": "0xa87084e533ff8caa8696b7d22b200a524ad3b18bb1b58166fc9387452be45034",
    "signature": "0x3c4769e0cb113322aec0bcb55f3d290ae7d0bdca3039a2c40cf45908e2c1406a5182c995e0e569079d93ad53dca00f0e83a7b66773d4cd66f691d360e90489d41b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}