{
  "manageEntity": {
    "action": "Save",
    "entityId": "2136093344",
    "entityType": "Track",
    "nonce": "0x3f4baa88141344506e82ad78762caa040286c3011f2c0e1e7400777363bbc1f8",
    "signature": "0x37bb17e0413bc3095ba0b67c8b654449328f2ee2dc500737817a6e0c7cb05a305f0b6736c89c8b14313381fc44f01509bb39cd215cfc606c2e02990e13d8139c1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}