{
  "manageEntity": {
    "action": "Save",
    "entityId": "1773744973",
    "entityType": "Track",
    "nonce": "0x4b14f6d99b213d3adc03353f38431dcd9c8da2045accd77da80715b2c61f6bbc",
    "signature": "0x26e3763a0b0453f5b95724e5d31ab62f44a167c7b75fdf0d3adc31739c2f66af5cb55cb92ac1739361900d26ea7a40e35faf679a040b0c46519e62aea8c760481c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}