{
  "manageEntity": {
    "action": "Save",
    "entityId": "1746616910",
    "entityType": "Track",
    "nonce": "0x73c052c60f172288ce22b96690b54a38d2977c4a86ec7291657dd508c1334a7e",
    "signature": "0x22e064b4d2f9f2984b279dd83801af06dddc30e45470ce87ee30dbe8532889cf6504fbd4368422c05cc0f88a4656c1d2774fea479203d4e651d9210993f6752d1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}