{
  "manageEntity": {
    "action": "Save",
    "entityId": "1847884204",
    "entityType": "Track",
    "nonce": "0xc44046adb6c76cdf88ac68486062aa4197ef9c817a9724a8887ccdbeb4a85711",
    "signature": "0x54df36cdfa3244405c927d55252ed51cc37196529e8f5713b0ade402c70c8b0b1775c8ea701845e8d611b49f442c39a7bce123db0a95861fe0ee0faaf7c4ccd21c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}